Iran insists it doesn’t punish people for their beliefs, but its prison population – and a scathing new report from the U.S. Commission on International Religious Freedom – say otherwise.

The bipartisan commission’s 2015 report on the Islamic Republic of Iran’s incarceration and persecution of Christians, Baha’is, Jews and minority Sunni Muslims prompted key lawmakers to call for new human rights sanctions targeting Iran’s clerical regime, and urged President Obama, whose administration is currently in nuclear negotiations with Tehran, to lead the way.